Indantetrol derivatives

ABSTRACT

Compounds are provided having the structure   WHEREIN N IS 1,2 OR 3, M AND M&#39;&#39; ARE 0, 1 OR 2, R1, R2, R3 and R4 may be the same or different and can be hydrogen, lower alkyl, halolower alkyl, acyl, lower alkoxy-carbonyl   D R A W I N G amido   or lower alkoxyalkylene, X is a straight or branched bivalent aliphatic radical and Y is   These compounds are useful in the treatment of hypertension.

United States Patent 91 [111 3,894,031

Hauck et al. July 8, 11975 INDANTETROL DERIVATIVES [75] Inventors: Frederic Peter Hauck, Somerville;

Joyce Reid, Highland Park; Venkatachaia L. Narayanan, Hightstown; Christopher M. Cimarusti, Hamilton; Rudiger D. Haugwitz, Titusville; Joseph E. Sundeen, Trenton, all of NJ.

[73] Assignee: E. R. Squibb & Sons, Inc,

Princeton, NJ.

22 i J 21 1973 wherein n is 1,2 or 3, m and m are 0, 1 or 2, R R

R and R may be the same or different and can be hy- [21] Appl- 372,448 drogen, lower alkyl, halolower alkyl, acyl, lower al- Related U.S. Application Data koxycarbonyl [63] Continuation of Ser. No. 71,229, Sept. 10, 1970,

abandoned.

i [52] U.S. Cl... 260/293.56; 260/239 BC; 260/243 B; (ROC),

260/247.2 B; 260/247.7 A; 260/268 BC; 260/295 F; 260/297 B; Zoo/326.33;

260/326.5 R; 260/482 c; 260/488 B; amdo 260/563 P; 260/999 [51 im. on C07d 29/24 0 53 Field of Search. 260/242.2 B, 268 Bc, 293.56, R. u

260/326.33, 326.5 R, 432 c, 488 B, 563 P, g

239 BC, 243 B [56] References Cited or lower alkoxyalkylene, X is a straight or branched OTHER PUBLICATIONS bivalent aliphatic radical and Y is Cohen, et 211., Chem. Abstracts 521731 lg (1958).

. R5 Primary Examzner-G. Thomas Todd Attorney, Agent, or FirmLawrence S. Levinson; Merle J. Smith; Burton Rodney These compounds are useful in the treatment of hy- [5 7] ABSTRACT pertension.

Compounds are provided having the structure 9 Claims No Drawings llNDANTETROL DERIVATIVE RELATED APPLlCATlONS This application is a continuation of copending application Ser. No. 71,229 filed Sept. 10, 1970, by Frederic P. Hauck, et al., and entitled lndantetrol Derivatives, now abandoned.

COMPOUNDS OF THE INVENTION The present invention relates to indanyl, naphthyl and benzosuberanyl derivatives which have a lowering effect on blood pressure and are useful in the treatment of hypertension, in mammallian species, for example, rats and dogs. In addition, the compounds of the invention can be employed as antibiotics. A compound of formula 1 (below) as well as its physiologically acceptable acid salts may be compounded according to pharmaceutical practice in oral or parenteral dosage forms such as tablets, capsules, elixirs, injectables or powders for administration of about 100 mg. to 400 mg. per day, preferably 125 mg. to 175 mg. per day, in 2 to 4 divided doses.

Furthermore, the compounds of this invention are useful as water softeners.

The compounds of the invention have the general formula:

wherein n is 1,2 or 3, m and m are 0, l or 2, R R R and R, may be the same or different and represent hydrogen, acyl, lower alkyl, halo-lower alkyl, lower alkoxy carbonyl amido or lower alkoxyalkylene, R and R are lower alkyl or monocyclic cycloalkyl, X is a single bond or a straight or branched chain bivalent aliphatic radical, and Y is The group may also form a heterocyclic radical.

X represents straight or branched chain bivalent aliphatic hydrocarbon groups having from zero to about ten carbon atoms, such as an alkylene group of the structure (CH wherein n is zero to ten, such as methylene, ethylene, propylene, trimethylene, butylene, dimethylethylene, and the like. Furthermore, X can correspond to any of the lower alkyl groups exemplified hereinafter; R R R and/or R and R and/or 1R may be an acyl radical of a hydrocarbon carboxylic acid of less than twelve carbon atoms, which may be exemplified by the lower alkanoic acids (e.g., formic, acetic, propionic, butyric, valeric, trimethyl acetic and caproic acids), the lower alkenoic acids (e.g., acrylic, methacrylic, crotonic, 3-butenoic and senecioic acids), the monocyclic aryl-carboxylic acids (e.g., benzoic and toluic acids), the monocyclic aryl-lower alkanoic acids, [e.g., phenacetic, B-phenylpropionic, a-phenylbutyric, and S-(p-methylphenyl)pentanoic acids], the cycloalkyl carboxylic acids, (e.g., cyclobutane carboxylic acid, cyclopentane carboxylic acid and cyclohexane caraboxylic acid), the cycloalkenyl carboxylic acids (e.g., 2-cycl0butene carboxylic acid and 3-cyclopentene carboxylic acid), the cycloalkyl and cycloalkenyl-lower alkanoic acids e.g., cyclohexaneacetic, a-cyclopentanebutyric, 2-cyclopenteneacetic and 3-( 3- cyclohexene) pentenoic acid], and the like.

The alkanoic acids may include halogen substituents, for example, trifluoroacetic acid. In addition, other acyl groups which can be employed are angeloyl, veratroyl, vanilloyl, erythro-2-hydroxy-2-methyl-3- acetoxybutyryl, l )-2-methylbutyryl; (d)-2-hydroxy-2- methylbutyryl; (d)-threo-2,3-dihydroxy-2- methylbutyryl and 1 )-erythro-2,3-dihydroxy-2- methylbutyryl.

The term lower alkyl" as employed herein includes both straight and branched chain radicals of up to eight carbon atoms, for instance, methyl, ethyl, propyl, isopropyl, butyl, t-butyl, isobutyl, pentyl, hexyl, isohexyl, heptyl, 4,4-dimethylpentyl, octyl, 2,2,4- trimethylpentyl, and the like.

Alkyl radicals substituted by F, Br, Cl or I are encompassed by the term halo-lower alkyl. Trifluorornethyl is a preferred halo-lower alkyl radical.

The term monocyclic aryl as employed herein contemplates monocyclic carbocyclic aryl radicals, for instance, phenyl and substituted phenyl radicals, such as lower alkyl phenyl (e.g., 0-, mor p-tolyl, ethylphenyl, butylphenyl, and the like) di(lower alkyl)phenyl (e.g., 2,4-dimethylphenyl, 3,5-diethylphenyl, and the like), halophenyl (e.g., chlorophenyl, bromophenyl, iodophenyl, fluorophenyl), o-, mor p-nitrophenyl, dinitrophenyl, (e.g., 3,5-dinitrophenyl, 2,6- dinitrophenyl, and the like), trinitrophenyl l(e.g., picryl).

The term monocyclic aryoyl includes any of the above aryl groups linked to a carbonyl group.

The term monocyclic cycloalkyl and monocyclic cycloalkenyl includes cyclic radicals containing from 5 3 to 6 ring members (e.g., cyclopropyl, cyclobutyl, cy-

clopentyl, cyclohexyl, cyclobutenyl and cyclohexenyl).

As indicated hereinbefore,

' may form a heterocyclic radical. The symbols R and R and R' and R' may together represent the carbon (and hydrogen) and the oxygen, sulfur or nitrogen atoms which, with the nitrogen or carbon atoms in the above group, form a 5-, 6- or 7-membered nitrogen heterocyclic containing not more than one hetero atom in addition to the nitrogen already shown in the group and less than 21 atoms in the radical (excluding hydrogen). The heterocyclic radicals may include one'to three substituents including lower alkoxy or lower alkyl as defined hereinafter; trihalomethoxy, such as trifluoromethoxy; trihalomethylmeroapto, such as trifluoromethylmercapto; N,N,-dialkylsulfamoyl groups, such as N,N-dimethylsulfamoyl; lower alkanoyl groups as defined hereinafter such as acetyl, propionyl, and the like; hydroxy; hydroxy-lower alkyl, such as hydroxymethyl, 2-hydroxyethyl, or the like; hydroxy-lower alkoxylower alkyl, such as '2-( 2-hydroxyethoxy)ethyl, or the like; alkanoyloxy containing an alkanoyl as defined herein; alakanoyloxy-lower alkyl (up to about 14 carbons in the alkanoyl group), such as 2- heptanoyloxyethyl; carbo-lower alkoxy, such as car- .bomethoxy, carboethoxy, carbopropoxy, or the like; or

2-(alkanoyloxy-lower alkoxy) lower alkyl (with up to about 14 carbons in the alkanoyl group), such as 2-(decanoyloxyethoxy)-ethyl, or the like.

Illustrative of the heterocyclic radicals represented by R3, 01 l pholino [e.g., 3-methoxythiamorpholino]; piperazinoy- (lower alkyl)piperazino [e.g., =N -methylpiperazino]; di(lower alkyl)piperazino [e.g., 2,-5-dimethylpiperazino or 2,6-dimethylpiperazino]; (lower alkoxy)piperazino [e.g., 2-methoxypiperazino], (hydroxy-lower alkyl)- piperazino [e.g., N -(2 hydroxyethyl)piperazino]; (alkanoyloxy-Iower alkyl)piperazino wherein the alkanoyloxy group has up to 14 carbons [e.g., N 2-heptanoyloxyethyl)piperazino a or; N -(2- dodecanoyloxyethyl)-piperazino]; (hydroxy-lower alkoxy-lower alkyl)p i pera zino [e.g., (hydroxy-methoxymethyl)piperazino]; (carbo-lower alkoxy)piperazino [e.g., N"-(carbome thoxy-,. carboethoxy or; .carbopropoxy)piperazin o]; homopiperazino; or N hydroxylower alkyl)homopiperazino;. g [e.g., N -.(2- hydroxyethyl)homopiperazino]; piperidyl, (lower .al-

kyl)piperidyl [e.g., l-, 2-, 3- or 4 -(lower alkyl piperidyl,

such as l-N-methylpiperidyl or 3-ethylpip eridyl]; di(- lower alkyl)piperidyl [e.g., 2,4-, 2,5-,. or 3,5-di(lower alkyl)piperidyl wherein lower alkyl is methyl, ethyl, npropyl, isopropyl, etc]; lower alkoxy piperidyl [e.g., 3-methoxypiperidyl or 2-ethoxypiperidyl]; hydroxy piperidyl [e.g., 3-hydroxyor 4-hydroxyp iperidyl]; aminomethylpiperidyl [e.g., 4-aminoethylpiperidyl]; pyrrolidyl; lower alkyl pyrrolidyl [e.g., l-N- methylpyrrolidyl]; di(lower alkyl) pyrrolidyl [e.g., 2,3-dimethylpyrrolidyl]; lower alkoxy pyrrolidyl [e.g., 4-N-methoxypyrrolidyl]; morpholinyl; (lower alkyl)- morpholinyl [e.g., 3-methylmorpholinyl]; di(lower alkyl)morpholinyl [e.g., 3-methyl-4-N- ethylmorpholinyl]; (lower alkoxy)morpholinyl [e.g., 2-ethoxymorpholinyl]; thiamorpholinyl; (lower alkyl) thiamorpholinyl [e.g., 3-ethylthiamorpholinyl]; di(- lower alkyl)thiamorpholinyl [e.g., 3-methyl-4-N- ethylthiamorpholinyl]; lower alkoxy thiamorpholino [e.g., 3-methoxythiamorpholinyl]; piperazinyl; alkyl, dialkyl, alkoxy or hydroxy-lower alkyl substituted piperazinyl.

The N-oxides of formula I where Y represents a nitrogen containing heterocyclic radical-can be formed by reacting such formula 1 compounds with a peracid such as m-chloroperoxy benzoic acid, perbenzoic acid or monoperphthalic acid in a suitable solvent such as chloroform.

The compounds of formula I form acid addition salts by reaction with various inorganic andorganic acids.

These salts frequently provide convenient means for separating the product from the reaction 'mixture in which it is produced or from the solvent in' which it is extracted in view of their insolubility in various media. Thus the product may be precipitated in the form of an insoluble salt and converted, by conventional techniques, to the free base or to another soluble or insoluble salt as desired.

Illustrative salts include the hydrohalides, such as hydrochloride, hydrobromide and hydroiodide, especially the first two, other mineral acid salts such as phosphate, sulfate, nitrate, etc., organic acid salts such as oxalate, tartrate, malate, maleate, citrate, pamoate, fu-

' marate, camphorsulfonate, methanesulfonate, benzenesulfonate, toluenesulfonate, salicylate, benzoate, ascorbate, mandelate, or the like. I

The compounds of formula I also form quaternary ammonium salts with lower alkyl halides, for example, methyl bromide, ethyl bromide and propyl iodide; benzyl halides, such as benzyl chloride; and dilower alkyl sulfates, such as dimethyl sulfate. To form the quaternary ammonium salts, the free base initially formed is interacted with at least one equivalent of the desired alkylatingagent. v e

Formula I includes all stereoisomersand mixtures thereof. Thus, Formula I includes compounds of the structurezim wherein all four OR groups are axial and R and R 0 are in trans configuration and CR and OR, are in trans configuration.

(CH2) n wherein R0 and R 0 are in trans configuration, and

0R and OR, are in trans configuration and R 0 and R 0 are diaxial and R 0 and R 0 are diequatorial.

wherein R 0 and R 0 are in cis configuration and CR and OR are in trans configuration and one of R 0 and R 0 is equatorial and the other axial and 0R and OR;

are diaxial.

wherein R0 and R 0 are in trans configuration and CR and OR are in cis configuration and R 0 and R 0 are diequatorial or diaxial and one of 0R and OR, is equatorial and the other axial.

l (E) a m X Y m (CH R O and wherein in (a) R 0 and R 0 are in cis configuration and OR and CR are in cis configuration and the pair of R 0 and R 0 and the pair of CR and OR are in cis configuration and wherein in (b) R 0 and R 0 are in cis configuration and CR and CR are in cis configuration and the pair of R 0 and R 0 and the pair of OR and OR are in trans configuration.

In each of (A) through (E),- X-Y can be up or down.

Preferred compounds are those where n is l, X is (Cl-l Y is an amino group, R R R and R are acyl, m and m are 0, but where m is l or 2, the R group is preferably at the 5 and/or 6 positions.

Examples of tetrols and esters thereof falling within the present invention are as follows:

1, no OH 7&5) -N\ fl 2, HO OH l ZcH -N HO OH HO OH 5,, HO OH (cH I HO OH 6 HO OH ULCZH5 v N HO OH HO OH OH I Each of the. above structures represent each'of the 5 possible isomers as outlined hereinbefore as well as mixtures of such isomers.

III

and OR, are all" axial (Type A), whichgcomprises forming a diene of the structure and converting the diene to the tetrol or tetrol derivatives of Formula I.

The tetrol (Type A) wherein R R R and R are hydrogen, can be formed by hydroxylating the diene to the corresponding tetrol, for example, by reacting the diene with formic acid and aqueous hydrogen peroxide,

at temperatures ranging from about 20 to about 40C.

I to form a mixture of esters, and then subjecting the mixture of esters to basic hydrolysis by dissolving the mixture of esters in a solvent boiling below about 100C., such as a monohydric alcohol containing up to four carbon,atoms (e.g., methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol or butyl alcohol), and

then treating the solution with a base, such as an alkalimetal or alkaline earth metal hydroxide or alkoxide (e.g., sodium hydroxide, potassium hydroxide, barium hydroxide, calcium hydroxide, sodium mthoxide or calcium diethoxide) and heating the mixture to temperatures ranging from about 40 to about C,, to form a tetrol (Type A) of the structure: I

wherein all hydroxyl groups are axial.

In the above reaction the hydrogen peroxide is employed in a molar ratio to the diene'of within the range of from about 2.2:1 to about 15:1 and preferably from about 2.2:1 to about 5:1. The base is employed in a molar ratio to the mixture of esters of within the range of from about 2.2:1 to about 10:1 and preferably from about 2.2:1 to about 5:1.

The Type (A) tetrol of Formula Ill can be converted to the corresponding tetra ester, i.e., where R R R and R are acyl as defined hereinbefore, by reacting the tetrol with an acylating agent, such as a hydrocarbon carboxylic acid vcontaining less than twelve carbon atoms as discussed hereinbefore, the acid anhydride thereof, or corresponding acyl halide, and an acid catalyst, such as perchloric acid, at a temperature within the range of from about 20 to about 0C. The acid, acid anhydride or acyl halide is employed in a molar ratio to the tetrol of within the range of from about 4:1 to about 20:1 and preferably from about 4:1 to about 10:1 and the acid catalyst is employed in a molar ratio to the tetrol of within the range of from about 1.1:1 to

about 2:1 and preferably from about 1.111 to about 15:1.

The tetrol of Formula 111 can be converted to the corresponding diester wherein R and R are acyl and R and R are hydrogen, by dissolving the tetrol in an organic base, such as pyridine, and treating the solution with an acylating' agent such as an acid anhydride (as described hereinbefore) or corresponding acyl halide in a molar ratio of acylating agentztetrol of within the range of from about 2.1 :l to about 10:1 and preferably from about 2.2:1 to about 6:1, while maintaining the reaction mixture at a temperature within the range of from about to about 20 and preferably from about to about to form a diester of the structure The Type A tetrol 111 can be converted to the corresponding triester wherein R,, R and R are acyl and R is hydrogen and X is preferably a single bond, where the nitrogen atom of Y is suitably located to participate in the acylation, by mixing the tetrol with a base, preferably pyridine, and reacting the mixture with an acylating agent such as an acid anhydride or corresponding acyl halide (as defined herebefore) in a molar ratio of acylating agentztetrol of within the range of from about 3:1 to about 10:1 and preferably from about 3:1 to about 5:1, at a temperature of within the range of from about 5 to about 40 and preferably from about 10 to about 30 to form a triester of the structure:

Acyl O O Acyl V lR 'l fie! 1 H Acyl 0 0E The above triester can be converted to the corresponding diester of the structure:

Acyl O O Acyl VI 1R 8 In :X-Y

i 1 (CH2) n HC J by treating the triester with an alcohol-water mixture in a volume ratio of alcoholzwater within the range of from about 9:1 to about 1:1 and preferably from about 1:1 to about 3:1. The alcohol-water mixture is employed in a weight ratio to the triester of within the range of from about 10:1 to about 100:1 and preferably from about 10:1 to about 50:1.

The tetrol 111 can be converted to the corresponding monoester wherein R is acyl and R R and R are hydrogen by treating the tetrol with a haloalkyl carbonate in a molar ratio of carbonateztetrol of within the range of from about 1.1:1 to about 100:1 and preferably from about 10:1 to about 50:1 at a temperature within the range of from about 20 to about 60 and preferably from about 25 to about 35 to form a monoester of the structure:

HO O Acyl VII 1R CH X-Y HX" l 2 n at b? wherein X" is a halogen.

1n an alternative procedure, the diene of formula 11 can be converted to the corresponding tetrol by dissolving the diene 11 in an organic carboxylic acid having up to about eight carbon atoms, such as acetic acid, treating the mixture with a silver salt corresponding to the acid, such as silver acetate (in a molar ratio of diene to silver salt of within the range of from about 1:2 to about 1:4 and preferably about 1:2) and iodine (in a molar ratio of diene to iodine of 1:1), heating'the reaction mixture at a temperature of within the range of from about 60 to about 110 and preferably from about to about to form a diester (depending on which acid and silver salt are employed) of the structure:

Acyl O VIII Acyl O The above diol can be converted to the tetrol by reacting the formic acid and hydrogen peroxide (as described hereinbefore), at temperatures ranging from about 20 to about 40C., preferably about 35, and then treating the mixture (free of solvent) with an alcohol and a base (as described hereinbefore) to form the tetrol wherein all ORs are axial and each pair of ORs are trans. (Type (A)).

The tetrol isomer or derivatives thereof of Type (A) can also be prepared by reacting the diene II with formic acid and one equivalent of an oxidizing agent, such diol olefin of the structure:

l as aqueous hydrogen peroxide, and after removal of solvent, dissolving the residue in an alcohol-base asdescribed hereinbefore to effect hydrolysis and form a The above diol olefin can then be converted to the tetto] of type (A) as described hereinbefore with respect to the conversion of the diol olefin IX.

Where Y is and at least one of R and R is or includes an aromatic ring, the Type (A) tetrols of the invention can be prepared by reducing structure: I

wherein X is lower alkylene as defined hereinbefore with respect to the corresponding diene, by reacting the indene iwith a reducing metal, such as lithium or sodium in liquid ammonia in the presence of a proton source such as a lower alcohol, to form the correspond ing hydroxyalkyl diene of the structure:

dissolving the hydroxyalkyl diene in a basic organic solvent, SUCl'lI'flS pyridine, cooling the solution to below 0, treating the solution with a solution of p-toluene sulfonyl chloride in pyridine, in a molar ratio of diene to ptoluene -sulfonyl chloride of within the range of from about 1:1 to about 121.5, and cooling to form the corresponding diene tosylate of the structure:

xIII (R reacting nae diene tosylate with an arylamine or substi tuted 'arylamine, aryl lower 'alkylamine or substituted aryl lower alkylamine or an amine of the'structure HN \Re (in a molar ratio of tosylate to amine of within the range of from about 1:2 to: about- .1:5) in an aromatic solvent-boiling below about 120C such as toluene or benz eneto form an-arninoalkyldieneofithe structure:

scribed hereinbefore, to form a tetrol of the structure:

a hydroxyalkyl compound of the I HO 'OH Xv 38' V/R'S m u pen HO OH wherein R' and R' are as defined above. When R-' and R" is benzyl it can be converted to a hydrogen atom by treating the tetrol with hydrogen in the presence of a catalyst for reduction, suchas' palladium on] strontium carbonate. v

Where Y is Nll theType (A) tetrols of the invention can be prepared by reacting an aminoalkyl indene' (prepared by reduction of the corresponding cyanoalkyl indene) or an aminoalkyl tetrahydronaphthalene with a reducing agent, such'as lithium ribbon in the presence of liquid ammonia,-ethyl ether, and a proton source such as a lower alcohol, to form a diene of the structure:

and reacting the diene with an acyl'halide' (wherein acyl and the halogen are as defined hereinbefore), such as benzoyl chloride, in a molar ratio of diene: halide of within the range of from about 1:1 to about 2:1 in a basic solvent, such as pyridine, triethylamine, or dilute base to form a diene of the structure:

X-Ni-PAcyl and reacting the diene with formic acid and an oxidizing agent, such as-hydrogen peroxide, and subjecting the product to basic hydrolysis (as described hereinbefore) to form an aminoalkyl tetrol of the structures XVIII Preparation of Other lsomers (Types B,C,D, and 1E) Tetrol isomers of Type (B) or esters thereof, that is:

can be prepared by treating a diester olefin of the structure:

Acyl O (R j: 8 m' an VIII OR I (c) HO (R (R m x-Y HO Y cis trans (equatorial-axial) (diaxial) can be prepared by dissolving a diene of the structure:

II (R8) m in an alkanoic acid containing from two to ten carbon atoms, such as acetic acid, containing from about 2 to about 10% water and preferably about 5% water, treating the solution with a silver salt corresponding to the acid, such as silver acetate and iodine in the same manner as described hereinbefore in the alternative procedure for preparing the Type (A) tetrol isomer, to form an olefin of the structure:

wherein X and Y are as defined hereinbefore (which is a novel intermediate).

The above monoalcohol monoester can be converted to the corresponding diol by basic hydrolysis, for example, by treatment with alcohol-base as described hereinbefore. The diol or the monoalcohol monoester can be converted to the Type (C) tetrol isomer by treating it with formic acid and an oxidizing agent, such as hydrogen peroxide and subsequently subjecting the resulting product to basic hydrolysis (all of which is described in detail hereinbefore in the preparation of the Type (A) isomer) to from the Type (C) tetrol isomer.

Tetrol isomers of Type (D) or esters thereof, that is:

trans cls (diequatorial or: (equatorial-axial) diaxial) can be prepared by converting a diene of the structure 11 to the corresponding diester olefin of the structure:

. The Type '(D) diester'diol-isomer canbe converted R are lower alkyl can be prepared by dissolving a tetrol of Formula I in a suitable nonprotonic solvent such as benzene, dioxane, ethyl ether or tetrahydrofuran, adding to the solution'at least four equivalents and preferably from about five to about seven equivalents of a metal hydride such as sodium hydride or sodium amide,

I thereafter adding to the mixture slowly with stirring to the Type (D) tetrol isomer by basic hydroylsis as described hereinbefore with respect to the Type (A) isomer.

Tetrol isomers 'of Type (E) or esters thereof, that is:

about four equivalents of a lower alkyl halide such as methyl iodide, methyl bromide or ethyl iodide, and maintaining the temperature of the reaction mixture within the range of from about to about 60C. and

' preferably from about to about 40C., to form the can be prepared by converting a diene of the structure ll to the corresponding monoalcohol monoester of the structure XIX as described'hereinbefore in the preparation of the Type (C) isomer, dissolving the monoalcohol monoester-in a basic solvent, for example, pyridine, treating the solution with an acid anhydride of an alkanoic acid containing up to about 6 carbon atoms,

such as acetic anhydride or acid anhydrides of any of the alkanoic acids mentioned hereinbefore, in a molar ratio of monoalcohol monoester to acid anhydride of within the range of from about 1:1 to about 1:5 and preferably from about 1:1 to about 1:2, to form 21 diester olefin of the structure:

and then treating the diester olefin with pyridine and osmium tetroxide (as described hereinbefore in the preparation of the Type (D) isomer), to form a mixture of Type E diester, diols of the structures:

The diester diols can be converted tothe corresponding Type (E) tetrols bybasic hydrolysis as described hereinbefore in the preparation of the Type (A)'isomers.

Preparation of Other Tetrol Derivatives The tetrol ethers of formula I wherein R R R and tetrol ether. Thereafter, ethyl alcohol and/or water can be added to decompose excess base, and the tetrol ether can be recovered by stripping down the organic solvent.

Tetrols of Formula I wherein R R R and R are halo-lower alkyl can be formed as described hereinbefore with respect to'the preparation of the tetrol ethers with the exception that an alkylene halohalide (or dihaloalkane) such as trimethylene chlorobromide or pentamethylene fluoroiodide, is employed in place of the 7 alkyl halide.

Tetrols of Formula I wherein R R R and R are lower alkoxy carbonyl can be formed as described hereinbefore with respect to theprepar'ation' of the-tetrol ethers with the exception that a dialkyl carbamoyl halide, such as dimethyl carbamoyl chloride or diethyl carbamoyl bromide, or a substituted isocyanate such as an alkyl or aryl isocyanate is employed in place of the alkyl halide. I?

Tetrols of Formula 1 wherein R R ,'R and R are lower alkoxyalkylene wherein the alkylene group contains two to five carbon atoms can be formed as described hereinbefore with respect to the preparation of the tetrol ethers except that an alkoxyalkylene halide such as ethoxypropyl chloride or ethoxyethyl bromide is employed in place of the alkyl halide. j

Tetrols of Formula I wherein R1, R2, R and R are can be formed as described hereinbefore with respect to the preparation of the tetrol ethers except than an alkylhaloformate such as methylchloroformate or ethylchloroformate is employed in place of the alkyl halide.

Alternative Methods for Preparing Naphthyl and Benzosuberanyl Derivatives l,2,3,4,5,8-hexahydronaphthalenes of structures XX A and XX E XXB may be prepared from tetralones in several ways known to the art. Reaction of a-tetralone with an aminoalkyl Grignard reagent followed by Birch reduction of the intermediate amino alcohol yields XX A directly.

Z-Substituted compounds (namely XX 18) can be prepared from ,G-tetraloneby removing the alcohol group by treatment with acidic reagents such as hydrochloric acid in acetic acid before the Birch reduction. Another method involves reaction of tetralones with a Wittigtype ylid to give side-chain nitriles which are reduced to primary amines and then substituted by well-known procedures to secondary or tertiary amines. A third process involves the Mannich bases derived from tetralones (i.e. reduction with LiAlH followed by Birch reduction yields XX B n'=1). Alternately quaternization followed by reaction with potassium cyanide or ethyl cyanacetate in the presence of base yields intermediates easily convertible to dihydronapthalenes containing side-chain amines (i.e., XX A or XX B where n=2 or 3 respectively). These are subjected to Birch reduction as above to yield hexahydronaphthalenes.

l,4,6,7.8,9-Hexahydro-5H-benzocycloheptenes of structures XX C, XX D and XX E T) (CH n 6 /"5 (CT N XX c k 2 1'1 \Re I (R (R XX D 5 /(CH2 6 8 m XX E may be prepared from the corresponding tetrahydro- 5,6, or 7-l-l-benzocyclohepten-5,6, or 7-ones in several ways known in the art starting with the ketone shown below.

l ml

Reaction of the ketones with an aminoalkyl Grignard reagent followed, if necessary, by dehydration, and reduction provides the corresponding aminoalkyl 6,7,8,- 9-tetrahydro-5lH-benzocycloheptene which is then subjected to a Birch reduction as described before. The starting ketones may also be reacted with a Wittig type ylid to produce side-chain nitriles which are reduced to primary amines and can then be substituted by standard procedures to secondary or tertiary amines before Birch reduction. Conversion of the starting ketones to oximes followed by reduction provides the corresponding primary amines where n=0 which then are reduced as above to the required dienes.

intermediates The dienes of the structure are novel intermediates. Examples of such dienes include the following:

l l J @l. CE-I N(CH 2 I i CII, ,-t' I-i C \l The diester and diol olefin intermediates of the struc- 40 C2H5 tures:

Acyl O HO, IX wherein acyl and X and Y are as defined hereinbefore 5 are novel intermediates. Examples of such diesters or diol olefins include, but are not limited to (CH N 7 Q 2 3 l O 9 CH3CO I ca co Ho 1 (C11 N'H H 'c c'o 14. 12 C 50 S', Ho l H502 CH The diol olefins of the structure X that is 2 n (R 3 m OH wherein X and Y are defined hereinbefore are novel intermediates.

Typical examples of die] olefins of the structure X correspond to the tetrols and esters and the diester and diol olefins of structure V111 and 1X set out hereinbefore.

Preparation of Starting Materials The diene intermediate:

can be prepared by the Birch reduction of an aromatic precursor of the structure: I I

. (IR 8 1 m XXll wherein X is a reactive halogen or other displaceable group such as tosylate and n is 1 to 10, with an amino compound of the structure:

XXV

wherein R and R are as defined hereinbefore, in a molar ratio of indenezamine of within the range of from about 1:2 to about 1:10 and preferably from about 1:2 to about 1:4, at a temperature within the range of from about to about 150 and preferably from about to about in the presence of a solvent having a boiling point below about C, such as toluene or xylene.

The aromatic indenyl precursor of the structure XXlll can be converted to the corresponding indanyl compound by reduction employing as a reducing agent, for example, hydrogen, in the presence of a catalyst for reduction, for example, platinum oxide.

The aromatic indenyl compounds of the structure XXlll can also be prepared by reacting indene with an amino alkylene halide of the structure:

-wherein X',,n, R and: R are as definedhereinbefore,

in the presence of a base, such as a concentrated aqueous solution of an alkaline earth metal hydroxide and Triton B in methanol; titatemperature'within the range of from about to about 759C. and preferably from about to about C. The indene is employed in a molar ratio to halide of within the range from about 1:1

, to'about 10:1 and preferablyfrom about 2:1 to about 4:1. The base is employed in a molar ratio to halide of within the range of from :about 3:1 to about 10:1 and preferably from about 3:l to about 5:1.

Indenyl compounds of the structure:

XXX

can be prepared by reacting a l-indanone or 2- indanone with an amino compound of the structure 1 XXV, i.e.,

(in a molar ratio of indanonezamine of within the range of from about 1:1 to about 1:4 and preferably from about .l:l.'l to about 1:15) in the presence of an aromatic solvent boiling below about 150C. such as tolucan be prepared by reacting l-tetralone and an amino compound of the structure XXV, i.e.

(molar ratio tetralones amine of 1 1.1 to about 1:15) in duction to form the diene starting material of structure II. The Birch reduction is carried out by reacting the aromatic precursor with lithium in a molar ratio to the lithium of within the range of from about 1:2 to about 1:50 and preferably from about 1:10 to about 1:20 in the presence of liquid ammonia, a proton source such as a lower alcohol and ethyl ether as would be apparent to one skilled in the art.

Examples of aromatic starting materials of the structure:

can be seen from Table A, wherein Wi' FLOLLaHCI n, n and X in the above formula are defined.

ene or benzene, and p-toluene-sulfonic acid, at a temperature of within the range of from about to about 125C. and preferably reflux temperature, removing water, solvent and excess amine reactant, dissolving the residue in an alcohol solvent boiling below about C., such as methanol, and adding an alkali metal borohydride, an organic acid, such as acetic acid, to destroy remaining borohydride, and a base,-to form the l or 2-indenyl compounds of structures XXX and XXXI.

Dihydronaphthalenew and. dihydrobenzosuberane starting materials of the structure: 1

xxxir Table B Continued CH CH3 1) c zr Examples of starting materials of the structure:

XXVI

can be seen from Table C wherein X, n, 1R and R are defined.

The following Examples further illustrate the invention.

EXAMPLE 1 l-[3-( 4,7-1Dihydrol -indanyl )propyl ]piperidine hydrobromide Crude l-[3-(4,7-dihydro-lindanyl)propyl]piperidine is prepared in 99% yield by the Birch reduction of l-[3-(3- indanyl)propyl]piperidine as follows:

A solution of 13.5g (0056M) 1[3-(3- indenyl)propyl]-piperidine in 100 ml. ether is added to l 1. liquid ammonia and 100 ml. ether. Lithium ribbon (20.0 g., 2.85 M) is added in several portions over a period of minutes while stirring. The mixture which is a greenish-bronze is stirred for l /2 hours and absolute ethanol is added dropwise until the color is discharged.

After the ammonia has evaporated, the residue is diluted to 1500 ml. with water and extracted two times with ether. The ether extracts are dried over potassium carbonate and the solvent is removed in vacuo leaving 13.9g. (100% yield) of diene identified as l-[3-(4,7- dihydrol -indanyl)-propyl]piperidine.

A 5.0 'g. sample of the diene is converted to the hydrobromide by dropwise addition of a hydrobromic acid solution to a solution of the diene until a pH of 4 is reached (pH meter). Removal of the solvent and crystallization of the crude yellow solid from ethanolether gives 3.8 g. (56%) of crystalline hydrobromide. One more recrystallization from the same solvent mixture yields 2.4 g. l-[3-(4,7-dihydro-lindanyl)propyl]piperidine hydrobromide, dec. l88196 C.

30 Analysis: Calcd for C l-l NlHlBr: C, 62.57; H, 8.65; N, 4.29 Br, 24.49

Found: C, 62.70; H, 8.60; N, 4.04 Br, 24.51.

EXAMPLE 2 3 a,7a-trans-5 ,6trans-l'lexahydrol 2- piperidinoethyl)-3a, 5,6,7a-indantetrol 2-( l-lndenyl)ethanol The above compound is prepared as described by Howell and Taylor, J. C. S., 1957, 3013. To butyl lithium, prepared from lithium (20.0 g.) and butyl bromide (234 g.) in ether, indene (116 g., 1.0 M) is added with stirring under nitrogen at -l0. After 1 hour at l0 ethylene oxide (88 g.) in ether (300 ml.) is added in /2 hour. After warming to 10, 500 ml. water is added cautiously and stirring is continued until there is no lithium remaining. The layers are separated and the organic layer is washed once with dilute l-lCl and three times with water. After drying, the ether is removed and the product distilled, collecting 76 g. (48%) at 125l35/0.2 mm. N. M. R. establishes the position of the double bond as 2,3.

2-( l-lndenyl)ethyl tosylate The alcohol described above (49 g., 0.306 M) is mixed with 64.8 g. (0.350 M) p-toluenesulfonyl chloride. The paste is cooled to 0 and pyridine (49 g., 0.62 M) is added dropwise over a period of one hour. The cold solution is stirred for four hours before an excess of dilute HCl is added. The product is extracted with ether yielding g. (99+%) viscous tosylate. N. M. R. establishes the position of the double bond as 2,3.

l-[ 2-( 3-Indenyl )ethyl]piperidine The crude tosylate (41.5 g., 0.13 M) and piperidine (28 g., 0.33 M) in 200 ml. toluene are heated under reflux overnight. Ether is added to the warm reaction mixture until crystals being forming. After cooling, the solid is removed by filtration and washed several times with ether. The filtrate and washes are combined and the solvents removed in vacuo. The oily residue is dissolved in ether, a small amount of insoluble material is removed by filtration, and the ether is removed from the filtrate leaving 29.7 g. (99%) of brown oil. The sample is purified by distillation at reduced pressure recovering 86% as a yellow oil boiling ll5/0.05 mm. to l30/0.l mm.

A solution of 15.0 g. (0.066 M) l-[2-(3-indenyl)- ethyl]piperidine in 100 ml. ether is added to l 1. liquid 31 ammonia and 100 ml. ether. Lithium ribbon-(20.0 g., 2.85 M) is added in several portions over a period of minutes while stirring. The greenish-bronze mixture is stirred l /2 hours. Absolute ethanol is added dropwise until the color is discharged (260 ml. required, added over a period of l hour 40 minutes). After the ammonia has evaporated, the residue is diluted to 1500 ml. with water and extracted two times with ether. The

ether extractsare dried over potassium carbonate and the solvent is removed in vacuo leaving 13.1 g. (86% yield) of amber colored oil. Comparison of the IR and UV of the product with those of the starting material indicates no starting material remains. The product is identified as 1-[2-(4,7-dihydro-1-indanyl)ethyl]piperidine. j

The diene (l 1.0 g., 0.048 M) is added dropwise over a period of 15 minutes to 100 ml. cold 98% formic acid.

This is followed by dropwise addition (40 minutes) of 57 ml. 0.5 M) 30% hydrogen peroxide maintaining a temperature of C. The temperature is then allowed to rise to 35 and is held at 3035, using a large water bath, for four hours before the mixture is left stirring overnight. The reaction mixture is taken to near dryness and any residual performic acid is removed by twice adding water and removing in vacuo.

The remaining yellow oil is dissolved in 100 ml. absolute ethanol and a solution of 30 grKOH in 50 ml. water is added. The mixture is heated under reflux one hour, cooled, and diluted to 500 ml. with water. This is extracted four times with ether. The ether extracts are dried over magnesium sulfate, filtered, and the ether is removed in vacuo leaving 7.2 g. (51%) yellowtan solid. Two recrystallizations from ethyl acetate give i 4.25 'g. yield) of 3a,7a-trans-5,6-transhexahydro-1-(2-piperidinoethyl)-3a,5 ,6,7a-indantetrol duced pressure.

piperidinoetliyl)'-'3a,5,6,7a indantetrol, as prepared in Example 2; 2.0 g., 0.00.67 mole) is dissolved in 35 ml.

pyridine. While cooling in an ice bath, acetic anhydride (18 ml.) is added dropwise over a period of-30 minutes.

After'stirring overnight at room temperature, the mix- 7 ture is taken to dryness in vacuo. The residue is -dissolved in chloroform and extracted two times with 5% K CO solution. .Thechloroform solution is dried over magnesium sulfate, filtered, and the chloroform is rei moved in vacuo. Benzene isadded two-times andremoved in vacuo to free'the sample of any residual pyriv dine. The remaining foamymaterial is dissolved-in an isopropanol-ethermixture and converted to the hydro} I chloride by addition of a solution of HCl in isopropanol" yielding 1.5 g. (54%) of the above-titled compound, m.p. 262-2 63C. Recrystallizationfrom an ethanol isopropanol mixture gives 1.0 g. (36%) of the above-i titled compound, m. p. 26 2263C.

Analysis:

. 32 EXAMPLE 4 3a,7a-trans-5 ,6-trans-Hexahydro- 1 5- piperidinopentyl)-3a,5,6,7a-indantetrol 3,5'-Bromopentylindene The compound is prepared as reported by Makoska in Tetrahedron Letters, 38, 4621-4624 (1966) by adding a mixture of equal molar quantities of indeneand 1,5-dibrom0pentane to aqueous NaOH containing methanolic Triton B. An oil forms which is purified by distillation. The material boiling at l4l147-C.,

0.1mm is collected (-50% yield) and identified as" 3 ,5 '-bromopentylindene.

l-[ 5-(Inden 3-yl)pentyl]pyridinium bromide i A mixture of the 3,5'-bromopentylindene (as preparedabove) g., 0.32 mole) and 28 g.(35 molel) pyridine in ml. acetonitrile is refluxed 20 hours. A small amount of ether is added to the warm reaction mixture (to turbidity). After further cooling, the'crys-' talline product 107.5 g., 98%) is removed by filtration and washed with ether, m.p. l42l46C. and identi fied as l-[5-(inden-3-yl)pentyl]-pyridiniumbromide.

I-[S-(Indan-l-yl)pentyl]piperidine i The 1-[5-(inden-3-yl)pentyl]pyridinium bromide de-.

scribed above (106 g., .31 mole) is hydrogenated on a Paar apparatus as follows. The bromide is divided up into four parts and fed into four bottles. Two hundred ml. methanol, and 0.6 g. platinum oxide catalyst are added to each bottle. Uptake of hydrogen is complete at room temperature within 75 minutes and agrees with theory for reduction of four double bonds. The catalyst is removed by filtration and the solvent is removed. The product is crystallized from a mixture of ethanol-ether (3:1) to give l03.6 g. (96%) of crystalline l-[5- .1 i .(indanyl-l-yl)pentyl]-piperidine hydrobromide, m.p. I

The hydrobromide is converted quantitatively to the free base by basifying an aqueous solution of the hydro- Y I bromide, extracting the free base with ether, drying the.

the ether at .re-

ether solution and finally removing 3a,7a-trans-5,6-trans-Hexahydro-1-(5r- I v piperidinopentyl)-3a,5,6,7a-indantetrol A solution of 16.3]gi (.06 of thefree 1 -[5-(indan- 1-yl)pentyl]piperidene base described above iii-100ml. i ether is added to 1L. liquid ammonia and 100 ml. ether. While the mixture is stirred 20.0,. g. 2.85 M) lithium ribbon is added in several portions over aperiod of 15 minutes. The bronze-blue mixture obtained .is stirred 45 minutes. Absolute ethanol is added dropwise until the blue color is discharged (375 ml; required, added Found: c, 57.13; 1, 8.27, 3.18 c1, 8.66.

- over a period of two hours).

The ammonia is evaporated. The residueis dilutedto f i 1500 ml. with water and extracted three times with 4 i ether. The ether extracts are dried over potassium carbi onate and the etheris removed in vacuo leaving 16.2 I g."(9 9%) of oil. Comparison of IR and'UV of the product and starting material indicates nostarting materialxs. remaineydg I The oil (16.2 g., .06 M) is added dropwis e o yer a. pe-' I p riodiof 15 minutes to 100 mli cold:98% forr'nic acid.

This i followed by dropw ise addition 25 minutes) of 59 .g. .'5 M)' 30% hydrogen p ergoxide maintaining a temperature of 20; The temperature isithen allowed to rise to 35 and'iis held at 30-35, using a large water bath, for 3 hours. It is then left stirring overnight..The reaction mixture is taken to near dryness Any residual performic acid is removed by twice adding water and removing in vacuo.

The remaining yellow oil is dissolved in 100 ml. absolute ethanol. A solution of 30 g. KOH in 50 ml. water is added. The mixture, which darkens immediately, is refluxed one hour. After cooling the mixture is diluted to 500 ml. with water. Crude brown viscous product (12.4 g., 61%) is obtained by extracting with ether. Crystallization from ethyl acetate and two recrystallizations from the same solvent with charcoal treatment yields a white crystalline product (3.2 g., 16%) melting 153156C. identified as 3a,7a-trans-5,6-transhexahydro-1-(5-piperidinopentyl)-3a,5,6,7a indantetrol Analysis:

Calcd for C l-l NO C, 66.82; 11-1, 10.33; N, 4.10

Found: C, 66.90; H, 10.43; N, 4.04.

EXAMPLE 3a,7a-trans-5,6-trans-l1-llexahydro-1-(5- piperidinopentyl)-3a,5,6,7a-indantetrol, 3a,5,6,7atetraacetate 3a,7a-trans-5,6-trans-l1-l1exahydro-1-(5- piperidinopentyl)-3a,5,6,7a-indantetrol as prepared in Example 4 (4.0 g., 0.012 mole), is added to 80 ml. acetic anhydride. Glacial acetic acid (5 ml.) is added to give a clear solution. While cooling the solution in an ice-salt bath, 70% perchloric acid (8 ml.) is added dropwise over a period of 0.5 hour. The mixture is kept at about C. for 16 hours. Cooling is continued during a dropwise addition of methanol (80 ml., 0.5 hour). After basification with concentrated ammonium hydroxide, the mixture is extracted three times with chloroform. The combined chloroform extracts are dried over magnesium sulfate, filtered, and the chloroform is removed in vacuo leaving 5.2 g. amber colored viscous material. Most of this material is dissolved in hot hexane (200 ml.). After cooling, 1.5 g. of crystalline product (the above-titled compound) (Crop 1) is harvested by filtration, m.p. 123-130C. Concentration of mother liquor yields several additional crops totaling about 1.6 g. [yield of crude crystalline material (the above-titled compound) 3.1 g., about 50% theory].

The Crop 1 material is recrystallized from hexane to give 1.3 g. (21% yield) melting l23128C.

Analysis:

Calcd for (1 11 180 C, 63.63; 11-11, 8.51; N, 2.75;

Found: C, 63.79; H, 8.50; N, 2.82;

EXAMPLE 6 3 a,7a-trans-5,6-trans-l-lexahydro-1-(5- piperidinopentyl)-3a,5,6,7a-indantetrol-5,6- diacetate, hydrochloride 3a,7a-trans-5,6-trans-l-lexahydro-1-(5- piperidinopentyl)-3a,5,6,7a-indantetrol as prepared in Example 4 (4.0 g., 0.012 mole), is dissolved in 70 m1. pyridine. The solution is cooled in an ice bath and acetic anhydride (35 ml.) is added dropwise over a period of 30 minutes. The mixture is stirred overnight at room temperature, then taken to near dryness in vacuo. The residue is dissolved in chloroform and extracted two times with 5% K CO The chloroform solution is dried over magnesium sulfate, filtered, and the chloroform is removed in vacuo, leaving an oily material. Benzene is added two times and removed in vacuo to free the sample of any residual pyridine.

The oil is dissolved in ether, filtered to remove a small amount of insoluble material, and converted to the hydrochloride by addition of a solution of lHICl in isopropyl alcohol yielding 4.4 g. Two recrystallizations from isopropanol-ether give 2.05 g. (38%) of the above-titled compound melting at 209-2l0C.

Analysis:

Calcd for C li-l NO 1-lC1: C, 59.79; 111, 8.73; N,

3.03; Found: C, 59.75; 11-11, 8.93; N, 3.00;

EXAMPLE 7 3a,7a-trans-5,6-trans-1H1exahydro-1-(3- morpholinopropyl)-3a,5 ,6,7a-indantetrol l-[3-(3-1ndenyl)propyl] morpholine 3,3 Bromopropylindene (23.7g, 0.1M), morpholine (22g, 0.25M) and 100 ml toluene are heated under reflux for two hours. After cooling, a large amount of solid is removed by filtration and washed with ether. The filtrate is concentrated in vacuo. The residue is dissolved in ether and filtered to remove a small amount of insoluble material. The ether is removed and the product is distilled collecting 220g boiling point 152l62/0.05mm. of the above tilled compound.

A sample of this material is converted to the hydrochloride m.p. 192-194C.

Analysis:

Calcd: C, 68.68; 11-1, 7.93; N, 5.02; C1. 12.67

Found: C, 68.92; H, 8.02; N, 5.10; C], 12.41

3a,7a-trans-5,6-trans-Hexahydro-1-(3- morpholinopropyl)-3a,5,6,7a-indantetrol A solution of l-[3-(3- indenyl)propyl]morpholine(16.5g, 0068M), as prepared above in ml ether is added to 1 1 liquid ammonia and 100ml ether. Lithium ribbon (25g) is added in several portions over a period of 20 minutes. The greenish brown mixture is stirred two hours. Absolute ethanol is added dropwise until the color is discharged (225ml required added over a period of two hours). After the ammonia has evaporated, the residue is diluted to 1500ml with water and extracted three times with ether. The other extracts are dried over potassium carbonate and the solvent is removed in vacuo leaving an amber oil. The UV on the amber oil (16.6g, 100%) indicated no starting material remained. The amber oil is identified as 1-[3-(4,7-dihydrol indanyl)propylhnorpholine.

The crude diene (0068M) is added dropwise over a period of 15 minutes to 100ml cold 98% formic acid. This is followed by dropwise addition (40 minutes) of 60ml 30% hydrogen peroxide maintaining a temperature of 20. The temperature is then allowed to rise to 35 and held at 3035 using a large water bath, for three hours. The mixture is stirred overnight in the bath. The reaction mixture is taken to near dryness and any residual performic acid is removed by twice adding water and removing in vacuo.

The viscous residue is then dissolved in 75ml absolute ethanol and treated with a solution of 30g. potassium hydroxide in 50ml water. After heating under re flux for one hour, the mixture is diluted to 500ml with water. Eour ether extracts yields 2.3g. yellow oil (Eraction A). The aqueous solution is then set up for continuous extraction with ethyl acetate. After 2 /2 hours 7.3g of (Fraction 1%) material is extracted. Overnight extraction yields an additional 3.5g (Fraction C). Total above titled compound amount extracted 13.1g (61%). From an ethyl acetate solution of (Fraction B) there is obtained 5.2g. of crystalline material which is recrystallized from ethyl acetate to give 3a, 7a-trans-5,6-trans-hexahydro-1-( 3-morpholinopropyl)-3a,5,6,7a indantetrol (4.2g, 20%) mp. l48-l51 C.

Analysis: Calcd for C H N C, 60.93; H, 9.27; N, 4.4 Found: C, 60.86; H, 9.03; N, 4.36;

EXAMPLE 8 in Example 7, (l.5g.,0.0048 mole) is added to 30ml acetic anhydride. Glacial acetic acid (about lml) is added dropwise to give a clear solution. While cooling in an ice-salt bath, 70% perchloric acid (3ml) is added dropwise over a period'of 15 minutes. The mixture is kept at -l5C for 20 hours. Cooling is continued during dropwise addition of methanol (30ml in 25 minutes). After basification with concentrated ammonium hydroxide, the mixture is extracted three times with chloroform. The combined chloroform extracts are dried over magnesium sulfate, filtered, and the solvent removed in vacuo leaving 2.35g of amorphous material. Crystallization from hexane yields 1.35g. (58%) of material melting 144l47C. This is recrystallized from the same solvent-yielding 950mg (41%) of the A melting at 145l48C.

Analysis:

Calc'd for C H N0 C, 59.62; H, 7.71; N, 2.90;

Found: C, 59.89; H, 7.52; N, 2.90;

i .EXAMPLE 9 K CO solution. The chloroform solution is dried over magnesium sulfate, filtered and the chloroform is removed in vacuo. The sample is freed of any residual pyridine by twic'e adding benzene and removing in vacuo. Most of the product is not solublein 75ml hot benzene and 1.95g (81%) of crystalline material is removed by filtration. Two recrystallizations from acetone yielded the above titled compound, 900mg. (38%) melting at lO0l25C.

Analysis:

A Calcd for C H NO C, 60.13; H, 8.33; N, 3.51;

Found: C, 59.92; H, 8.45, N, 3.53;

EXAMPLE 2,3a,5-cis-6.7-trans-Hexahydro-2-piperidino#3a,5,6-

,7a-indantetrol l-( 2-Indanyl )piperidine A mixture of 79g(0.6mole) of B-indanone and 100 ml. of piperidine in 500 ml. of benzene is treated with 0.5g p toluenesulfonic acid and heated under reflux with a water takeoff trap attached. Heating continued 3 hours, no additional "water being collected near the end of this period. The solvent and excess piperidine is maintained below 30C, 40g. of sodium borohydride (NaBH is added in several portions. The mixture is allowed to stir an additional two hours and then a small amount of acetic acid is added to destroy any NaBH, remaining. The mixture is then made strongly basic by adding NaOH solution, 250 ml. of water is added, and most of the methanol is removed in vacuo. The product is extracted with three portions of ether, the extracts dried over KOH and the ether is removed in vacuo. The product (l-(2-indanyl)piperidine) is distilled, collecting l07g(89%) boiling l25-l30C/l.0 mm. which solidifies on standing.

A small amount of this material is converted to the hydrochloride. After two recrystallizations from 2- propanol the material, mp. 257259C, analyzed as follows:

Analysis: A

Calcd: C, 70.72; H, 8.48; N, 5.89; CI, 14.91;

Found: C, 70.75; H, 8.49; N, 5.93; CI, 14.96;

. 1-(4,7-Dihydro-2-indanyl) piperidine A solution of the distilled -l-(2-Indanyl)piperidine (40.2g,0.2M) in 350 ml ether is added to 2.5 1 liquid ammonia and 250 ml. ether. Lithium ribbon (50g) is added in several portions over a period of 20, minutes.

The blue-bronze mixture is stirred 30 min.- before absolute ethanol is added dropwise until the color is discharged (475 ml. required, added over a period of two hours). After the ammonia has evaporated, the residue is cooled and diluted to about 4 l. with water, and then A A sample of this material is converted to the hydro- 4 bromide. After two recrystallizations from 2-propanol,

the material, dec: 244-246 analyzes as follows:

Analysis: Calcd: C, 59.16; H, 7.80; N, 4.93; Br, 28.11; Found: C, 59.14; H, 7.73; N, 4.87, Br, 28.06;

2,3a,5-cis-6,7a-trans-Hexahydro-2-piperidino-3- ,5,6,7a-indantetrol The crude diene as prepared above (37g, 0.18M) is added in several portions to 300 ml cold 98% formic acid. This is followed by dropwise addition (1 hour) of v 30% hydrogen peroxide (170ml) maintaining the temperature at 20-25C. The temperature is then allowed to rise to 35 and is held at 3035, using a large water bath, for 3 hours before the mixture is left stirring overnight, in the bath. The reaction mixture istaken to near dryness and any residual performic acid is removed by twice adding water and removing in vacuo.

The viscous residue is then dissolved in 300 ml. absolute ethanol and treated with' a solution of g. KOH in 100 ml. water. .After heating under reflux one hour the dark-brown mixtureis'diluted to 1.1. with water. Four extractions with ether and three with ethyl acetate yields a total of 32.3g. (about 66%) of partially crystalline material. Heating the. material with benzene and ethyl acetate gives 22.4g (46% yield) crystalline mate- UV indicates no starting material rerial. A portion of this material is recrystallized two times from 2-propanel to give 2,3a,5-cis-6,7a-transhexahydro-2-piperidino-3a,5,6,7a-indantetrol, m.p. 238241C.

Analysis:

Calcd: C, 61.96; H, 9.29; N, 5.16;

Found: C, 61.90; H, 9.28;-N, 5.10;

EXAMPLE 1 1 3a, 7a-trans-5,6-trans-Hexahydro-2-piperidino- 3a,5,6,7a-indantetrol, 5,6-dibenzoate.

2,3a,5-cis-6,7a-trans-Hexahydro-Z-piperidino- 3a,5,6,7a-indantetrol, as prepared in Example 10, (2.0 g., 0.0073M) is partially dissolved in 25 ml. pyridine and 6 ml. benzoyl chloride is added. The dark reaction mixture is heated on a steam bath for one hour. The solvent is removed in vacuo and the residue is treated with saturated NaHCO solution. The product is extracted with chloroform. The dark brown viscous material remaining after removal of the solvent is chromatographed on neutral alumina'activity grade TV. The product (1.45 g., 41%) is eluted with ether and recrystallized from ether-pet ether to yield the above titled compound, 1.0 g. (28%) mp. 146147.5C.

Analysis:

Calcd for C H NO C, 70.12; H, 6.94; N, 2.92;

Found: C, 70.12; H, 7.08; N, 2.63

EXAMPLE 12 2,3a,5-cis-6,7a-transl-lexahydro-2-piperidino- 3a,5,6,7a-indantetrol, 3a, 5,6-triacetate, hydrochloride. 2,3a,5-cis-6,7a-trans-Hexahydro-2-piperidino- 3a,5,6,7a indantetrol, as prepared in Example (4.0g;0.0147 mole) is partially dissolved in 70 ml. pyridine. The mixture is cooled in an ice bath and acetic anhydride (35ml) is added dropwise over a period of 40 minutes. The mixture is stirred overnight at room temperature. The clear amber solution is then taken to dryness in vacuo. The residue is dissolved in chloroform and extracted two times with 5% K CO solution. The chloroform solution is dried over MgSO filtered, and the solvent is removed in vacuo. The sample is freed of any residual pyridine by twice adding benzene and removing in vacuo. Crystallization from benzenepet ether yielded (28, -3aR, 58, 6S, 7aR)-hexahydro-2- piperidino-3a,5,6,7a-indantetrol-3a,5,6-triacetate, 205 g. (35%) melting at l26141C.

A portion of this material is converted to the hydrochloride. Two recrystallizations from isopropanol gives the above-titled compound melting at 236-237C (dec.).

Analysis,

Calculated for C H NO .HCI: C, 55.36; H, 7.43; N,

3.23; Cl, 8.17; Found: C, 55.60; H, 7.56; N, 3.32, Cl, 8.20

EXAMPLE l3 3a,7a,-trans-5,6-trans-Hexahydro-2-piperidino- 3a,5,6,7a-indantetrol, 5,6diacetate and 2,3a,5-cis- 6,7a-trans-hexahydro-2-piperidino-3a, 5 ,6,7aindantetrol,3a,5 ,6-triacetate.

A mixture of210 ml. pyridine and 105 ml. acetic anhydride are stirred and cooled in an ice-water bath. A 2,3a,5-cis-6-7a-trans-hexahydro-2-piperidino-3a, 5, 6, 7a-indantetrol (12.5 grams, .046 mole) is added slowly with stirring. The ice bath is removed and the solution allowed to stir overnight at room temperature.

A portion of the solution is evaporated to an oil. Benzene is added and evaporated twice in vacuo. Addition of ethyl acetate affords a yellow solid, 3a, 7a-trans-5,6- trans-hexahydro-2-piperidino-3a, 5, 6, 7a-indantetrol, 5.6-diacetate, hydroacetate (10.34 grams, 54% yield).

A portion of the solution is diluted with three volumes of methylene chloride. Filtering yields a yellow solid, the hydroacetate of the free base of 2,3a,5-cis- 6,7a-trans-hexahydro-2-piperidino-3a, 5, 6, 7aindantetrol 3a, 5, 6-triacetate (4.20 g., 20%).

Each product is converted to the respective free base by treatment with saturated bicarbonate solution, extraction with methylene chloride and evaporation in vacuo.

From 2.95 grams of hydroacetate of free base of 2,3- a,5-cis-6,7a-trans-hexahydro-2-piperidino-3a, 5, 6, 7aindantetrol 3a, 5,6-triacetate is obtained 2.93 grams crude free base.

From 7.15 grams of diacetate hydroacetate is obtained 5.33 grams (87.0%) free base after crystallization from hot ethyl acetate. A 3.65 g. sample (m.p. 126.5 129.5C) is recrystallized from hot ethyl acetate to afford 2.21 g. of analytical sample (m.p. 128131C).

EXAMPLE 14 3a, 7a-trans-5,6-trans-ll-lexahydro-2-piperidino-3a, 5,

6, 7a-indanetetrol, 3a, 5-diacetate A 3.33g. (.00837 mole) sample of the free base of 2,- 3a,5-cis-6,7a-trans-hexahydro-2-piperidino-3a, 5, 6, 7a-indantetrol-3a, 5, 6-triacetate is allowed to stand overnight at room temperature in 850 ml. of methanol: water (9:1 The solution is evaporated and the residue taken up in methylene chloride. The solution is shaken vigorously with saturated sodium bicarbonate solution. The organic layer is separated, dried (Na SO and evaporated to an oil which yields 1.77 g. (m.p. 183-185C) on crystallization from hot ethyl acetate. A second crystallization from hot ethyl acetate affords the above-titled compound (m.p. l84.5 185.5C).

EXAMPLE 15 2,3a,5-cis-6,7a-trans-hexahydro2-piperidin0-5,6,7a-

indantetrol-3a-monoethyl ester hydrochloride A solution of 800 ml. of ethyl ether and 2 g. of 2,3a,5- cis-6,7a-trans-hexahydro-2-piperidino-3a, 5, 6, 7aindantetrol is treated with ml. of chloroethylcarbonate. A precipitate forms. The mixture is stirred overnight at room temperature. The solid is filtered off and collected (1.7g).

The filtrate is evaporated and the residue is treated with acetone. The resulting solid (0.1g.) is identical with the first solid.

The combined fractions are recrystallized from methanol and ether and the above-titled compound is obtained (m.p. 193-4).

Analysis,

Calculated for c n rvo ci; C, 53.76; H, 7.96; N,

3.69; Cl, 9.33 Found C, 53.52; H, 8.28; N, 3.61; CI, 9.52.

EXAMPLE l6 lHlexahydro-l-[3-(-l-pyrrolidinyl)propyl]-3a. 5, 6. 7a-indantetro1 l-[ 3-( 3-llndenyl )propyl pyrrolidine 

1. A COMPOUND OF THE STRUCTURE
 2. A compound according to claim 1 wherein R1, R2, R3 and R4 are hydrogen or alkanoyl of 1 to 3 carbons.
 3. A compound according to claim 2 wherein R1, R2, R3 and R4 are acetyl.
 4. A compound according to claim 1 having the structure
 5. A compound according to Claim 1 having the structure
 6. A compound according to claim 1 wherein R1, R2, R3 and R4 are lower alkyl, halo-lower alkyl, or lower alkoxy-alkylene.
 7. A compound according to claim 1 wherein R1, R2, R3 and R4 are amido.
 8. A compound according to claim 1 wherein R1, R2, R3 and R4 are lower alkoxy carbonyl.
 9. A process for preparing compounds as defined in claim 1 wherein Y is 